I agree with the qualitative point but think it irrelevant. Not only are we not facing a "yes or no" button, but all that you claim in the above is that it "may well be rational to push yes" (emphasis added) in the event that we are faced with such a button. This says very little.

Again, I reiterate the point made in the grandparent. A hypothetical about a yes-or-no button is no answer to someone specifically advocating a third alternative. If you don't think the third alternative is possible, argue against it directly; don't pretend it was never proposed.